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sys: FspFsvolFileSystemControlReparsePoint: FSCL_DELETE_REPARSE_POINT

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This commit is contained in:
Bill Zissimopoulos 2017-01-03 00:48:12 -08:00
parent eecca688bc
commit 23eabe5939
1 changed files with 35 additions and 9 deletions
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44
src/sys/fsctl.c
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@ -134,27 +134,51 @@ static NTSTATUS FspFsvolFileSystemControlReparsePoint(
if (IsWrite) if (IsWrite)
{ {
ASSERT(
FSCTL_SET_REPARSE_POINT == FsControlCode ||
FSCTL_DELETE_REPARSE_POINT == FsControlCode);
if (0 == InputBuffer || 0 == InputBufferLength) if (0 == InputBuffer || 0 == InputBufferLength)
return STATUS_INVALID_BUFFER_SIZE; return STATUS_INVALID_BUFFER_SIZE;
if (0 != OutputBufferLength) if (0 != OutputBufferLength)
return STATUS_INVALID_PARAMETER; return STATUS_INVALID_PARAMETER;
if (FSP_FSCTL_TRANSACT_REQ_BUFFER_SIZEMAX - (FileNode->FileName.Length + sizeof(WCHAR)) < ReparseData = (PREPARSE_DATA_BUFFER)InputBuffer;
InputBufferLength)
return STATUS_IO_REPARSE_DATA_INVALID;
Result = FsRtlValidateReparsePointBuffer(InputBufferLength, InputBuffer); if (FSCTL_SET_REPARSE_POINT == FsControlCode)
if (!NT_SUCCESS(Result)) {
return Result; if (FSP_FSCTL_TRANSACT_REQ_BUFFER_SIZEMAX - (FileNode->FileName.Length + sizeof(WCHAR)) <
InputBufferLength)
return STATUS_IO_REPARSE_DATA_INVALID;
/* NTFS seems to require one of these rights to allow FSCTL_SET_REPARSE_POINT */ Result = FsRtlValidateReparsePointBuffer(InputBufferLength, InputBuffer);
if (!NT_SUCCESS(Result))
return Result;
}
else
{
if ((ULONG)FIELD_OFFSET(REPARSE_DATA_BUFFER, GenericReparseBuffer) != InputBufferLength &&
(ULONG)FIELD_OFFSET(REPARSE_GUID_DATA_BUFFER, GenericReparseBuffer) != InputBufferLength)
return STATUS_IO_REPARSE_DATA_INVALID;
if (0 != ReparseData->ReparseDataLength)
return STATUS_IO_REPARSE_DATA_INVALID;
if (IO_REPARSE_TAG_RESERVED_ZERO == ReparseData->ReparseTag ||
IO_REPARSE_TAG_RESERVED_ONE == ReparseData->ReparseTag)
return STATUS_IO_REPARSE_TAG_INVALID;
if (!IsReparseTagMicrosoft(ReparseData->ReparseTag) &&
(ULONG)FIELD_OFFSET(REPARSE_GUID_DATA_BUFFER, GenericReparseBuffer) != InputBufferLength)
return STATUS_IO_REPARSE_DATA_INVALID;
}
/* NTFS seems to require one of these rights to allow FSCTL_{SET,DELETE}_REPARSE_POINT */
if (!FlagOn(FileDesc->GrantedAccess, if (!FlagOn(FileDesc->GrantedAccess,
FILE_WRITE_DATA | FILE_APPEND_DATA | FILE_WRITE_ATTRIBUTES)) FILE_WRITE_DATA | FILE_APPEND_DATA | FILE_WRITE_ATTRIBUTES))
return STATUS_ACCESS_DENIED; return STATUS_ACCESS_DENIED;
ReparseData = (PREPARSE_DATA_BUFFER)InputBuffer;
if (IO_REPARSE_TAG_SYMLINK == ReparseData->ReparseTag) if (IO_REPARSE_TAG_SYMLINK == ReparseData->ReparseTag)
{ {
/* NTFS severely limits symbolic links; we will not do that unless our file system asks */ /* NTFS severely limits symbolic links; we will not do that unless our file system asks */
@ -248,6 +272,8 @@ static NTSTATUS FspFsvolFileSystemControlReparsePoint(
} }
else else
{ {
ASSERT(FSCTL_GET_REPARSE_POINT == FsControlCode);
if (0 != InputBufferLength) if (0 != InputBufferLength)
return STATUS_INVALID_PARAMETER; return STATUS_INVALID_PARAMETER;